Submission #1146437

#	Time	Username	Problem	Language	Result	Execution time	Memory
1146437		crispxx	XOR Sum (info1cup17_xorsum)	C++20	7 / 100	1695 ms	4168 KiB

xorsum

/**
 *    author: a.k
 *    created: idk
**/
#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define pb push_back
#define nl '\n'

const int N = 4e3 + 1;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	
	int n; cin >> n;
	
	vector<int> a(n);
	
	for(auto &u : a) cin >> u;
	
	int res = 0;
	
	for(int i = 0; i < n; i++) {
		for(int j = i; j < n; j++) {
			res ^= (a[i] + a[j]);
		}
	}
	
	cout << res << nl;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23